Accepted name: AdoMet-dependent heme synthase
Reaction: Fe-coproporphyrin III + 2 S-adenosyl-L-methionine = protoheme + 2 CO2 + 2 5′-deoxyadenosine + 2 L-methionine
Other name(s): ahbD (gene name); SAM-dependent heme synthase
Systematic name: Fe-coproporphyrin III:S-adenosyl-L-methionine oxidoreductase (decarboxylating)
Comments: This radical AdoMet enzyme participates in a heme biosynthesis pathway found in archaea and sulfur-reducing bacteria. cf. EC, hydrogen peroxide-dependent heme synthase.
1.  Bali, S., Lawrence, A.D., Lobo, S.A., Saraiva, L.M., Golding, B.T., Palmer, D.J., Howard, M.J., Ferguson, S.J. and Warren, M.J. Molecular hijacking of siroheme for the synthesis of heme and d1 heme. Proc. Natl. Acad. Sci. USA 108 (2011) 18260–18265. [PMID: 21969545]
2.  Kuhner, M., Haufschildt, K., Neumann, A., Storbeck, S., Streif, J. and Layer, G. The alternative route to heme in the methanogenic archaeon Methanosarcina barkeri. Archaea 2014:327637 (2014). [PMID: 24669201]
[EC created 2019]